Because he was last seen at the casino, the case is being turned over to Okla. authorities.

In an email from Simpson, he said they believe there may be an endangerment issue with Pierce.

He was last seen wearing a grey long sleeve shirt, OU baseball cap, blue jeans and red and black Puma shoes. He has a tattoo on his upper right bicep or a thorn wrap, and a tribal band on the left bicep. He's approximately 5'10, 190 lbs, with a muscular build.